Home / 91,709.20-137,583.61-28,528.12

Finding the Fourth Proportional to 91,709.20, 137,583.61 and 28,528.12

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Solution

The fourth proportional to 91,709.20, 137,583.61 and 28,528.12 is: 42,798.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    91,709.20 : 137,583.61 = 28,528.12 : x
  2. Step 2: Convert to fraction form
    91,709.20/137,583.61 = 28,528.12/x
  3. Step 3: Cross multiply
    91,709.20x = 137,583.61 × 28,528.12
  4. Step 4: Simplify right side
    91,709.20x = 3,925,001,593.47
  5. Step 5: Solve for x
    x = 3,925,001,593.47/91,709.20
  6. Step 6: Final answer
    x = 42,798.34

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.